Which of the following alarms can be activated from the Deck House?

The alarm that can be activated from the Deck House is specifically related to collision. The Deck House typically serves as a command station from which critical operations are conducted, including monitoring navigational and safety conditions. When a potential collision is detected, an alarm must be initiated promptly to alert the crew of the impending danger, allowing for immediate action to avoid dangerous situations.

While all the other options represent serious emergency situations that require quick responses, their activation points may not typically include the Deck House, depending on the vessel's specific layout and safety protocol. For instance, alarms for fire, security breaches, or flooding are often activated from various locations throughout the vessel, such as engineering spaces or designated emergency stations, rather than being centrally monitored or controlled from the Deck House. Thus, regarding emergency responsiveness and navigational safety, the collision alarm holds a unique significance, affirmatively linking to the operational responsibilities managed from the Deck House.